1215005513240 has 32 divisors (see below), whose sum is σ = 2735863799760. Its totient is φ = 485628624000.

The previous prime is 1215005513237. The next prime is 1215005513243. The reversal of 1215005513240 is 423155005121.

It is an interprime number because it is at equal distance from previous prime (1215005513237) and next prime (1215005513243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215005513243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11621726 + ... + 11725805.

Almost surely, 2^{1215005513240} is an apocalyptic number.

1215005513240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215005513240 is an abundant number, since it is smaller than the sum of its proper divisors (1520858286520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215005513240 is a wasteful number, since it uses less digits than its factorization.

1215005513240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23348843 (or 23348839 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 1215005513240 in words is "one trillion, two hundred fifteen billion, five million, five hundred thirteen thousand, two hundred forty".